Condense
To make denser or more compact, as when a material (water vapor etc) changes from it's gas phase to it's liquid phase |
Condensation
The conversion of water vapor or other gas to liquid phase as the temperature drops; the act or process of condensing |
Coping
The covering piece on top of a wall exposed to the weather, usually made of metal, masonry, or stone and sloped to carry off water |
Copolymer
The product of polymerization of two or more substances, as two different isomers, together |
Core Sample
(1) a smaple taken from a low-slope roof system for the purpose of obtaining information about it's construction. Typically core sample analysis can reveal the type of materials used, the number of plies, thiickness and condition of insulation (if present) and the type of deck material used as the substrate for the system.
(2) in regards to an SPF roof system, core samples are used to obtain both quantitative and qualitative information (thickness of the foam, thicness and adhesion of the coationg, thickness of installation passes, and adheasion between each pass and to the substrate. |
Cornice
The decorative horizontal molding or projected roof overhang |
Counter batten
Vertical wood strips installed ona sloped roofs over which horizontal batens are secured. The primary roof covering is attached or secured to these horizontal battens (tile, slate, aluminum shingles etc) |
Counterflashing
Metal or elastomeric sheeting, secured on or into a way, curb, pipe, rooftop unit or other surface, to cover and protect the upper edge of base flashing and it's fasteners. |
Course
A term used for a row of roofing material , and/or one layer of a series materials. |
CPA
Copolymer alloy |
Cricket
A relatively small area of a roof constructed to divert water from a horizontal intersection of the roof with a chimney, wall, expansion joint or other projection. |
Curb (curbing)
A raised member used to support roof penetration fixtures, skylights, mechanical equipment (HVAC) hatches etc, above the roof surface, also a low raised roof perimeter. |
Cure
A process whereby a material is caused to form permanent molecular linkages by exposure to chemicals, heat, pressure, weathering. Cure time is the time required for a material to reach it's resiliant long term characteristics. Cured, is also used in reference to the time frame a material has been exposed to weather, and will eventually lose it's resiliant qualities. |
Dead level
Absolutely no slope |
Deck
A structural component of a roof. The deck supports the design, dead, and live loads, including the weight of the roof system, and additional live loads (ie snow etc.) as set forth (requred by) in building codes. The seck also provides the substrate to which the roofing or waterproofing system is applied to the structural surface of a building. Decks can be non combustible, metal, concrete, gypsum, or combustible, wood, plywood, osb etc. |
Degradation (degraded)
A change in the chemical structure, physical properties or appearance of a material from natural or artificial exposure, (UV, moisture, heat, freezing, wind etc)
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Delamination
Separation of the laminated layers of a component |
Dimensional Shingle
a shingle that is textured, or laminate to produce a three dimensional effect **See architectural shingle** |
Dormer
A structural projection from a sloping roof, typically housing a window, or a ventilation fixture |
Downspout
A vertical pipe, or conduit used to facilitate runoff water from a scupper, or gutter of a building to a lower roof level, to the ground, or a storm drain system. |
Drip Edge
Metal flashing, or other overhanging component with an outward projecting lower edge, used to control the direction of dripping water and help protect underlying building components (fascia etc) |
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